In short,
Acts 2:38 can be dissected is as follows:
Acts 2:38 (KJV)
38 Then Peter said unto them, Repent (unto justification by faith, Romans 5:1; Galatians 3:24; Ephesians 2:8), and be baptized every one of you in the name of Jesus Christ for the remission of sins (unto identification with Christ, having the conscience cleansed, John 3:5; I Peter 3:21, and therefore forgiveness experienced), and ye shall receive the gift of the Holy Ghost (unto regeneration, John 3:5; Romans 8:28–30; 2 Corinthians 1:22; Ephesians 1:13; Ephesians 4:30; 2 Corinthians 5:17; Galatians 4:5; Titus 3:5; 1 Peter 1:23) .
My point is... we do well to allow God to be the judge of those who may have experienced justification before God as a result of their repentance and faith, and yet had yet to move forward into the realities of identification and regeneration.